Describe the bug

I have tested web script with pagespeed https://pagespeed.web.dev and have these errors:

1. Mixed Content: The page at 'https://www.example.com/' was loaded over HTTPS, but requested an insecure frame 'http://developers.google.com/#_methods=onPlusOne%2C_ready%2C_close%2C_open%2C_resizeMe%2C_renderstart%2Concircled%2Cdrefresh%2Cerefresh&id=I0_1741107425921&_gfid=I0_1741107425921&pfname=&rpctoken=15460460'. This request has been blocked; the content must be served over HTTPS.

2. Unload event listeners are deprecated and will be removed.
   webpack://ruffle-selfhosted/../core/dist/ruffle_web.js:1074:13

Expected behavior

1. The Ruffle script should not trigger Mixed Content errors by attempting to load insecure resources (http://) on an HTTPS page. All external dependencies should be loaded over HTTPS to comply with security policies and avoid browser blocking.

2. The script should not rely on unload event listeners, as they are deprecated and will be removed in future browser versions. The script should use modern alternatives to ensure future compatibility.

I expected the script to run without security-related warnings and deprecated feature notices in the browser console.

Content Location

https://www.ooo.lt/zaidimas/pasirupink_suneliu/

Affected platform

Online demo

Operating system

Windows 11, all browsers

Browser

No response

Additional information

First of all, I want to sincerely thank you for creating such an incredible script. Ruffle has saved millions of SWF games that were developed over many years, allowing millions of people to continue playing their favorite games. Your work has made a huge impact, and I truly appreciate it!

Regarding the issue, if needed, I can provide additional logs or debugging information to help resolve it. Let me know if there's anything specific I should test or check.